Knotter



Ely.;

H. D, COLMAN,

KNOTTER.

APPLICATION FILED OCT. 26, I9I8.

Patented Aug. 1I), 1920.

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- UNITE-DJ' STAT/Es APriaiai: esti-ca..

HOWARD D. coLiviAN, or aocnroan, innnvois, Assienoa ro Brianna-ccm a COMPANY, E ROCKFORD,

ILLINOIS, A CORPORATION OF ILLINOIS.

State of Illinois, have invented certain new and useful Improvements in Knotters, of which the following is a speciication.

The object of this invention is to eliminate the shearing function of the tying bill and to provide special means for shearing the strand or strands clamped in the bill. .I have herein shown'my invention as vembodied in a weavers lmotter oi' the type disclosed in Patent No.4 '1,2415 58, granted Oct. 2,1917, upon an application filed by Earle D. Parker.

'In the accompanying drawings, Figure I is a ragmental side elevation of one forni of knot-tying implement embodying my invention and illustrating the manner in which it is used. in the initial position. '4 ing the parts in the positions occupied when the tying .bill has completed somewhat more than one revolution. *ig 3 is a diagrammatic view of the tying bill and shear. Fi'g. 4 is a raginental perspective view showing thel parts in approximately the positions occupied in Fig. 2. Fig. 5 is a fragmental plan view showing placed in operative relation to the implement, l and representing the parts in the initial position.

The invention is herein vshown as embodied in a mechanism comprising a tying bill Jfor forming the loops oi the knot and for clamping one of the-threads; a devicefor shearing said thread; means for tightening the loops of' the kn'ot and stripping the knot from the` tying bill; a device for. shearing the other thread and assisting to strip the knot Afrom the tying bill; and guide'sffior properly positioning the threads'with` relation tothe mechanism.

WhileV the invention various.. forms and used for various purposes7 I shown a mechanism which is especially intended Jfor uniting the j' threailso'a bobbin and a-spool, and which i of the operative'byineans similar to that is arranged'tq be supported upon the hand .shown in said Parker patent, said, means Specification of Iletters Patent.

Application flied october 2e, isis. serial No.

. The

how the vthreads are may beembo'died in- Patented Aug. il), f.

comprising a handle A6. A standard or trarnework A is rigidly iXed to the handle A? and is provided with bearings for the shaft oi the tying bill; said tying bill comprises la relatively rigid jaw C5, a spring jaw CS and a clamping jaw C14 arranged to be pivotally moved into and out of the space between the jaws C5 and C8 by means of a cani barrel C. On the tying bill shaft is a spiral pinion that meshes with a spiral segment 'BT (Fig. l). Said segment is rotatively inounted upon a stud B which is fixed to the handle A6. Fixed with relation "to the gear set; ment is a thumb fork B5 by means of 'which the segment may be oscillated to rotate the tying bill in onedirection through approrimately one and a half revolutions and in the opposite direction to the initialposition.

The means herein shown for tightening the loops of the knot and stripping the knot from the xtying bill comprises a threadolding arm pivoted to swingv onl the axis D. forward end of said arm is in forni oi' a h ook E to receive one ofthe threads to be tied, namely, the thread extending from the bobbin. A torsion spring E3 tends to hold the arm E iii its initial position, such position being determined by contact ot the arm with a stop A8 on the standard A. v yA. thread-clamping arm DG, provided at its forward end with two upwardly-extend ing clamping fingers D7 that lie at opposite sida of the holding arm E, is pivot-ed at its rear end to one arm ot a bellv crank D- that swings onthe axis D. The other arm of the bell crank is provided with a roller stud that lies in a cam groove BB (Fig. 5) formed in an arcuate flange Bgnvhich is fixed with relation to the gear segment B7. The shape oi the cam groove BB is isuch as to cause the bell crank Di to swing back and forth in each stroke oi the thumb-fork B, During the operating c., downward) stroke of the thumb-fork, the arm DG is advanced so as to cause the fingers D7 to clamp the thread lying in thehook E of the arm E. As the arm D advances, a spring latch (Fig. 2) on the arm E engages a stud D8 on the bell crank D4, so that when the movement of the bell crank is reversed the arm E is caused to move with the bell crank and the arm D, in which movement the said arms swing lat At thc side orn the tying bill, opposite td' the arms E and D is astationar' thread Substantially like the device 6 fully sgad :in Said' patent. 4o

guide C19 for the thread .extending from the bobbin.

The position of thehook E with relier` ence to the tying bill is such that the tying bill in its revolution cannot engage the portion of the bobbin thread that extends between said hook and bill.

For supporting the thread extending from, the spool, suitable meansmay be provided, as, for example, a bracket l (Fig. 4) fixed to a frame member 2, said `frame member being rigidly fixed'to the standard A. Upon the bracket l is a thread clamp 'whicli may consist, as herein shown, of a jaw 3 fixed to v said bracket, and a co-acting spring jaw 3b attached to the bracket, said jaws having flaring forward ends to facilitate the inser-v tion of the thread into the clamp. A pin i (Fig. 1) fixed to the jaw 3a and extending through a perforation in the jaw 3b limits the extcntto which the thread may beinsorted into the clamp. The clamp 3 is located forwardly of' the tying bill. The bracketl is notched to form a guide 5 for the thread extending from the spool. The

clamp 3 also nia'y be termed a`gu1de or sup-v port for the spool thread.v

1e waste end of the'thread coming 'l'romv the spool is cut off by'a device 6, which is The guides and 5 are spaced apart, and the bottom of thenotch ofthe guide 5 is 'below the horizontal plane of the pin 4, soy

that the portion of the spoolthread extending between the tying bill'and the guide'` isl below the portion extending betweenv the tying bill and the guide 3.

l Any-suitable means may be provided for advancing the device 6 to grasp the strand extending between the tyingbill and the.

guide 5.. Hereinl I have shown said device as fixed upon an arm 12 which maybe pivoted to the frame member 2, as shown in said patent. A link 14 connects the forward Yp0rtion of the arm 12 to a member 15 fixed to the arm D". Thus, when the arms E and D6 swing outwardly to tighten and 'strip the knot, 'the-device 6 is advanced to grasp the severed, namely, the portion extending be portion of the spool thread 'which is to be tween the vknot and the guide 5. The path of the device iiis; close to the tying bill in order that 'the spool thread shall be severed as close to the knot as possible.

The jaw of the device 6 may be swung to shear, clamp and release the spool thread slide 22. lSaid slide has a dove-tail guide 23 which slides in a correspondingly-shaped groove2fi (Fig. 4) in the standard or frame work A. The slide 22 is further guided by means of a' bar 25 fixed to the slide and extending through a guide 26. The blade 21 is provided with a finger 27 having a round'- ed forward end which is arranged to engage the spring shear blade 2O and guide the latter into operative relation Ito the blade 21. The slide'22 is reciprocated by means of a lever 28 pivoted at 29 to the framework and having a pin-and-slot connection with the slide. 0n the lever 28 is a roller stud 30 that lies in the cam groove 31 of a plate p 32 fixed to the fork B5.

As indicated in Fig. 2, the shear blade 2l reciprocates in the s ace` between the tying bill. and the guide l?, and relatively close to the tying bill so as to sever the bobbin thread as close to the knot as possible. The blade 20 is located.at one side of the orbit of the bill. The path oi' reciprocation of the blade 2l intersects said orbit. Assuming the implement to be mounted upon the left .hand of 'a spooler tender and the mechanism to be in initial position (2'. e., in the position shown in Figs. l and 5), the threads are manipulated as follows:

When it is desired to unite the end of the end of the bobbin thread across thepalm of the ri,ht hand, the loose end projecting .beyon fthe thumb,'and the hand beingv held palm upgzvllfThe' rotation of the spool is then stopped by placing' the. left hand on the top of the spool, and the end of the spool thread found and placed in the palm of the right hand, the loose end projecting slightly beyondv the little finger. The right hand, being still held palm side up, is raised and the spool thread placed in the clamp 3. The right hand is then turned toward the left to lay the bobbin thread in the hook E and behind the tying bill and in the guide C1?. The right hand is then turned farther toward the left and brought forward, thus carrying the spool thread over the bobbin thread and down into the guide 5. lThe bobbin thread now extends through the hook E11,'behind `the tying bill, and into the guide C1?, and the spool thread is doubled over the bobbinv bill turns when beginning itsv revolution.

The operative then depresses .the thumb fork o with the thninb of the left hand. As soon :is the tying bill and the devine il have clamped the threads, the operative drops the loose end I takes hold ot the united threads, draws d threads ont of the cls-nip 3 and removes lier hend from the spool.

rthe operation oi" the mechanism nrey be brieiy described as follows:

lepression of the thumb fork B5 cerises the tying bill to rotate Counter-clockwise, thereby7 engaging the doubled spool tnreed and ceiling the threads around the bill. After about three-fourths of a revolution, the portion of the bobbin thread W lich er;- tends bot-Ween the tying` bill andthe guide Cw is received in the open tying bill. llering;V the ensuing half revolution, the bob'oni thread is clamped by the bill, ater which the advencing shear blade 2l eoacts with the li lade to sheer the bobbin thread, and the device i5 is advanced to clrnn'p'and shear the portion o' the spool ihre-rid which extends between the tying bill and the guide The hobbin thrend has also been elznnped by the lingers D? end hoolr E, end the arms l?" and D have swung laterelljf, thus pulling the loops ot the knotonto trie point ot the tying bill. As the arins E and i3 and the device con tinue to rnove rleterelly, the loogs oit the knot :ire pulled olif the tying bill find drawn r'rght, kind the thread end line-ily pulled ont of the tying bill. he end clamped in the device G is released :is seid device is inoved with the nrrn l into the initial position by the spring The operative then swings the tnnrnb fork E5 np to the initial position, therebj,7 restoring. the parts oi the mechernisin to their initial positionsn l claim as my invention:

l. A knot-tying mechanism having, in combination, e rotary tying bill; means tor supporting a thread extendingv cross the tying bill, bill being;r adapted to clamp said thread; 'ine-ans for snpf'iorting a thread which is ,doubled over the 'other thread; fr shear 'for severing' e portion of said other thread; a sheer tor severing ai portion ot said doubled thread; Ineens for revolvingn the tying bill against the doubled thread, the other thread being thereetter caught by the tying' hill and elainpedg and means for actuating seid shears.

A 2. A lrnottying nieehenisn'i having, coinoination, a rotary tying bill; inea-ns for supporting a thread extending' aeross the tying bill, said bill being adapted to clamp said thread; two thread gnides'for supporting a thread which is doubled over the other thread, said guides being spaced spart so as to support the strands of the doubled d reed et an angle to each other; :leans .tor shearing one et seid strands ot the doubled for shearing the Waste end reread; Ineens o' the other thread; end ineens for ing the tying bill and the shearing Ineens.

3. A knot-tying mechanism having, in combination, a rotary tying; hill; an oscillartory erin adapted to clamp e thread and move evvny troni the tying bill to tighten 'the ltnot and strip the thread from the tj ing bill; Ineens for supporting a thread which is doubled over 'the other thread; e stationary shear blade adj scent to the tying bill; e eoaicting reciprocatory sheer blade or severing; seid other thread; and Ineens ,e e 1 or shearing e portion or seid doubled thread.

il. -r knot-tying' nieehenisin 'hrwing in combination, guides for supporting two threads, one ot' Whieh threads is doubled over the other, a tying bill for ceiling the doubled thresd and els-inning' the other thread, a` sheer for trimming off one strand et' the doubled thread, and a sheer ope-ret ing adjacent to the tying bill for trimming oil one strand ot seid other thread after said strand hes beenkclarnped in the tying will A lnottying mechanism having, in combination, e rotary tying bill adapted to Gianni; e thread, a stationery guide for supporting seid thread, e stationary shear blade, end coacting shear blade arranged 'to reciprocate in the space between the tying bill and said guide and tiniedto shear said ,threwl after the latter has l been clamped in the bill.

6. knott'ying ,mechanism having, in combination, e. rotarjv7 tying bill adapted to clamp a thread, e stationary guide for suft porting seid thread, e stationery sheer blade, end e cr'iaeting sheer blade arranged to reciprocate an( timed to sheer said thread after the letter has been clamped in the bill, said stationarj7 shear ol-,ide being located ont of the path of' said bill and said reciprocating shear blade moving across the path of part ot' said bill.

7. A lrnottying mechanism he ring, in eon'ihination, a rotary tying bill adapted t. clump e thread, stationery guide means for supporting said thread. and shear ineens independent of said guide ineens, said sheer ineens being; located between said `guide means und said bill and timed to shear said thread after the latter has been clamped in the bill.

ln testimony whereof, l lieve hereunto set my hand.

noire-,en n Aootnan.

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